Lifestyle factors and non-medicinal interventions are a key aspect of effective diabetes management; nevertheless, most people with diabetes will progress to require medication to maintain or improve control of their condition. With there now being seven classes of oral blood-glucose-lowering drugs to choose from, along with several glucagon-like peptide-1 receptor agonists and many different types of insulin, the pharmacological management of type 2 diabetes has become complex. Furthermore, diabetes prescribing now accounts for nearly 10% of all prescription costs. In England, during the financial year 2013–14, there were just over 45 million items prescribed to treat diabetes at a cost of £803 million (Health and Social Care Information Centre, 2014).
The progressive nature of the type 2 diabetes means that blood-glucose-lowering therapies often need to be intensified over time. In addition to antihyperglycaemic agents, medication is often indicated to reduce cardiovascular risk, with many people being prescribed drugs for hypertension and dyslipidaemia. Some individuals also develop diabetes-related complications, including peripheral neuropathy and erectile dysfunction, which may necessitate drug therapy. Common comorbidities such as depression may also need to be managed pharmacologically. In short, the potential pill burden for many people with diabetes is considerable.
Treatment challenges
Despite strong evidence to support the benefits of good diabetes management, especially early in the condition (Holman et al, 2008), and an abundance of evidence-based guidance to which clinicians are encouraged to refer (e.g. NICE, 2009; SIGN, 2010; Inzucchi et al, 2015), in practice we are guilty of “clinical inertia” – favouring an approach which fails to intensify therapies in a timely fashion (Heine et al, 2006). People with type 2 diabetes may, therefore, have sup-optimal blood glucose control for prolonged periods and be placed at an increased risk of developing complications.
Poor medication concordance is another major obstacle to achieving maximum benefit with drug treatments. It has been estimated that only around half of the medicines prescribed for long-term conditions are actually taken (Department of Health, 2001). Furthermore, over a decade ago, DARTS (the Diabetes Audit and Research Tayside Study; Donnan et al, 2002) demonstrated very poor concordance with oral hypoglycaemic drug therapy. Of the 2920 people included in the study, “adequate adherence” (defined as ≥90%) was found in only around one-third of those prescribed either sulphonylurea or metformin alone. The association between poor adherence and daily number of tablets was linear and statistically significant.
Also pertinent here, from a health system perspective, is the issue of wastage. The gross annual cost to the NHS of medicines wastage in England has been estimated to be around £300 million (York Health Economics Consortium and School of Pharmacy – University of London, 2009).
The reasons for poor medication concordance are highly complex, with many potential influencing factors, including denial over the diagnosis, forgetfulness, absence of symptoms and concerns about side effects.
The stories about medications that people encounter in newspapers, on television or on the Internet can, alongside advice and opinion from family and friends, have a considerable impact on attitudes regarding medication; but, as we all know, such information may be unreliable and inaccurate. The medication review is an ideal opportunity to dispel any myths that proliferate in this way.
Patient involvement in treatment decisions
Current health policy advocates greater patient involvement in decisions about treatment, hence the slogan “No decision about me, without me” (Department of Health, 2010). It has been suggested that increasing the involvement of patients in prescribing decisions and supporting them in taking their medicines will lead to improvements in patient safety, health outcomes and satisfaction with care (Shaw, 2002).
The extent to which an individual wishes to engage in this process will vary, but it is something we should offer to every patient. People can only make informed decisions if they have a good understanding of their condition and the therapies that are being prescribed to manage it. The fascinating Diabetes Information Jigsaw Report investigated what people with diabetes understood about their condition and how it was treated and revealed that one in three people did not know what their medication was for or how to take it (Browne et al, 2000). One of the most eye-opening findings was that just 10% of those taking a sulphonylurea were aware that it could cause hypoglycaemia. According to Diabetes UK, not all people with diabetes wish to undertake formal education courses; nevertheless, it is hugely disappointingly that only 12% of people newly diagnosed with type 2 diabetes were offered structured education in 2011–12 (Diabetes UK, 2014).
Markers of poor concordance
Failure to order sufficient quantity of medication or failure to collect prescriptions on time, or indeed at all, provides evidence of poor medication concordance and is worth checking as part of the review process. However, it is important to recognise that collection of a prescription does not guarantee its use.
Medication reviews
NICE (2011) recommends that “people with diabetes agree with their healthcare professional to start, review and stop medications to lower blood glucose, blood pressure and blood lipids,” as part of its quality standard for diabetes in adults. One aspect of this process is the measurement of the proportion of people with diabetes who have received a medication review in the previous 12 month period.
The medication review has been defined as “a structured, critical examination of a patient’s medicines with the objective of reaching an agreement with the patient about treatment, optimising the impact of medicines, minimising the number of medication-related problems and reducing waste” (Shaw, 2002). Up until 2012, there was a “medication review” indicator within the Quality and Outcomes Framework (QOF), with a requirement to undertake a medication review every 15 months for all patients being prescribed repeat medicines. Despite being “retired” as a QOF indicator, most GP clinical systems continue to provide prompts to carry out medicine reviews.
The underlying principles of such a review include the following (Shaw, 2002).
- All individuals should have a chance to raise questions and highlight problems about their medicines.
- Medication review seeks to optimise the impact of treatment for the individual.
- The review should be undertaken in a systematic way, by a competent person.
- Any changes resulting from the review should be agreed with the individual.
- The review should be documented in the individual’s notes.
- The impact of any change should be monitored.
During the review, the healthcare professional will be checking, among other things, the factors presented in Box 1. The quantity and breadth of items presented in Box 1 illustrates the fact that a great deal needs to be covered in the relatively short time-frame of a typical diabetes consultation, and any strategies to make the most efficient use of the time would thus be useful. As part of this, I believe that we could do a lot more to help individuals prepare for their medication review.
The “Ask about Medicines” campaign ran from 2003 to 2009 and its mission was to encourage better communication between patients and their health professionals (Shaw, 2009). Central to the campaign were some suggested questions that patients might like to ask their healthcare professional (examples appear in Box 2). Following on from this campaign, a guide specific to diabetes medicines was produced and may still be downloaded from http://bit.ly/1HfjW75 (accessed 14.05.15).
If such a resource were given to individuals prior to their review, they could formulate pertinent questions about their medication and be better prepared. The healthcare professional could then concentrate effort on what really matters to the individual.
Another useful resource is the “NO TEARS” tool, which was designed to provide a framework upon which to structure a medication review (Lewis, 2004). As the focus of this paper, this tool is described in detail below.
The “NO TEARS” tool
The “NO TEARS” tool can be used as a mental prompt, but it also has sufficient flexibility that it can be tailored to suit the individual practitioner’s particular consulting style. Its purpose is to maximise the value of a medication review within the confines of a 10-minute consultation. Given the increasing complexities of diabetes management, this time constraint presents a real challenge; nevertheless, this is a useful tool providing a structure for diabetes medication reviews. The name “NO TEARS” is a mnemonic (see Box 3), and the seven components are described below in the context of diabetes, based on my own clinical experience.
N – Need and indication
One of the most important considerations in medicines reviews is why each drug is being prescribed and whether the patient benefits from taking it. This might involve confirmation that the correct diagnosis was made in the first place (e.g. was hypertension diagnosed based on a blood pressure reflecting the evidence base?).
The rationale for prescribing each drug should be questioned (e.g. is it for symptom control or is it to reduce long-term complications?) so that efficacy may be measured against expected outcome. It is important to reassess ongoing need and determine whether circumstances have changed (e.g. weight loss may alter treatment requirements and drug doses). It is an opportunity to consider lifestyle, changes to which can make a significant difference to long-term outcomes. Sometimes people will try to improve lifestyle in order to reduce medication, and seeing a positive outcome can be a powerful motivator.
Some drugs are meant to be used for a fixed period (e.g. dual antiplatelet therapy post-myocardial infarction) but may not have been stopped. Conversely, certain medications are stopped prior to procedures. For example, it is recommended that metformin be suspended before intravascular administration of iodinated contract agents and not recommenced earlier than 48 hours after the test (electronic Medicines Compendium, 2015). Similarly, metformin tends to be stopped during the acute phase of an illness – owing, for instance, to the risk of lactic acidosis in people taking this drug who experience an acute worsening of renal function (electronic Medicines Compendium, 2015) – but it is worth checking that it has subsequently been re-instated.
People with diabetes can develop other conditions, or there may have been a deterioration of pre-existing conditions, which can affect management or the ongoing safety of the drugs being prescribed. Recent hospital admissions and outpatient appointments may have resulted in changes to medication or the addition of new drugs that may not be compatible with current medications.
O – Open questions
Individuals’ understanding of their treatment, as well as their health beliefs and attitudes, will influence whether or not they take prescribed medications, and so this is an important area to explore.
Open questions like those listed below are useful because they encourage a person to express their views.
- What do you think about your medications?
- What are you taking regularly?
- What other over-the-counter medications do you take?
- How and when do you take your medications?
- Do you know why you are taking X?
- Have you any concerns or worries about taking your medication?
Encouraging patients to be more actively involved in prescribing decisions may improve concordance. Asking, as non-judgementally as possible, whether they miss any medications, or have difficulties accessing their prescription, opening the packaging or swallowing tablets, is also useful (this may require some closed questions). Other areas that may be useful to explore with individuals include: who collects their prescriptions; and whether a dosette box might be beneficial.
T – Tests and monitoring
There are several ways of assessing the effectiveness of diabetes medications. It may be appropriate to ask about symptom relief for those who were experiencing symptoms. However, for many, the primary goal of therapy is to reduce the risk of developing complications rather than symptom control. HbA1c is often regarded as the definitive measure of good glycaemic control and it may be used to assess a person’s response to a new therapy and for gauging ongoing efficacy. The HbA1c is, however, a composite measure reflecting both fasting and postprandial hyperglycaemia, and so, in certain circumstances and for certain blood-glucose-lowering therapies (including insulin), it may be more appropriate to check the individual’s own blood glucose monitoring record.
A periodic review of other parameters is vital, including renal and liver function, as these affect the metabolism of oral agents and thus have a potential impact on safety (e.g. Scheen, 2014).
Agreeing realistic targets and sharing results with individuals can help them see the benefits of taking certain medications and can help to reinforce ongoing medication concordance.
E – Evidence and guidelines
The evidence base in medicine is constantly evolving. As new evidence emerges, treatment recommendations may change, and so it is essential to consider whether the approach is still in line with current guidelines or whether any of the prescribed drugs are now considered to be less suitable and if the most appropriate doses are being used.
A – Adverse events
Most drugs are associated with potential side effects (adverse reactions to medicines are implicated in 5–17% of hospital admissions [Zhang et al, 2009]), and where these are troublesome, people may decide to stop taking them or to take them less often than recommended. Individuals should be asked about side effects and given strategies to deal with them, such as adjusting doses, switching to another medicine with a different side-effect profile, or even changing the timing of taking medicines. Other drugs may be prescribed to mitigate side effects, although it may be more appropriate to consider alternatives that are better tolerated or better suited to an individual. Preparing people for likely side effects is also a useful strategy.
Some diabetes medications are associated with well-recognised risks, such as that of hypoglycaemia with sulphonylureas and insulin. With regard to hypos, it is essential that individuals know how to minimise the risk, how to recognise signs and symptoms, and how to manage episodes appropriately. The implications for driving and for certain occupations need to be discussed and documented.
R – Risk reduction or prevention
A key objective of diabetes treatment is to reduce the risk of developing complications. In the absence of troublesome symptoms, it can be difficult to convey the value of taking medications now to prevent potential problems in the future (Ortendahl and Fries, 2006). Healthcare professionals need to translate raw data from clinical trials or risk calculators into information that individuals can understand and use to make an informed choice. This involves helping them to decide if the benefits of a therapy outweigh all the possible known side effects or risks associated with the drug itself.
S – Simplification and switches
Keeping drug regimens simple helps to improve adherence and some regimens are unnecessarily complicated. Findings from the aforementioned DARTS (Donnan et al, 2002) suggested the following potential ways to improve medication concordance: simplifying drug regimens; minimising tablet counts; and using once-daily, modified-release or fixed-combination preparations. That is not to say that simplifying and switching is without issues, but it is worth considering, and in some cases there are substantial potential benefits.
Conclusion
There are many issues relating to medication that we need to convey to people with diabetes, including the need for optimisation of therapy over time and the role of medicines in risk reduction. We have to identify barriers related to medication-taking and help people to set personalised goals and agree realistic expectations.
The NHS spends a huge amount on medication, and diabetes is a condition which tends to require multiple medicines. The evidence suggests that medication concordance is a particular problem for those with long-term conditions, and, given the current economic constraints, it is imperative that we make the most efficient use of scarce resource. Medication reviews provide an opportunity to assess the efficacy, acceptability, safety and tolerability of drugs, which should improve medication concordance, enhance patient satisfaction, reduce unnecessary wastage of medicines and maximise the benefit of the interventions.
Improving how we help patients prepare for their medication review and using tools like “NO TEARS” should help to structure the process and support healthcare professionals in making the most efficient use of limited time.
Further information
A Guide to Medicines Review (National Prescribing Centre). Available at: http://bit.ly/1MHyYE6
A Single Competency Framework for all Prescribers (National Prescribing Centre). Available at: http://bit.ly/1GJWGPO
Scotland-wide advice to inform the process of making injectable weight management drugs available and to prevent variation between Health Boards.
14 Nov 2024